| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | "Jeffrey W(dot) Baker" <jwbaker(at)acm(dot)org> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: LWLock contention: I think I understand the problem |
| Date: | 2001-12-30 02:30:23 |
| Message-ID: | 200112300230.fBU2UNx08655@candle.pha.pa.us |
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| Lists: | pgsql-hackers pgsql-odbc |
>
>
> On Sat, 29 Dec 2001, Bruce Momjian wrote:
>
> > OK, here are the results on BSD/OS 4.2 on a 2-cpu system. The first is
> > before the patch, the second after. Both average 14tps, so the patch
> > has no negative effect on my system. Of course, it has no positive
> > effect either. :-)
>
> Actually it looks slighty worse with the patch. What about CPU usage?
For 5 clients, CPU's are 96% idle. Load average is around 5. Seems
totally I/O bound.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
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